Comparative evaluation of surface roughness and color stability of nanohybrid composite resin after periodic exposure to tea, coffee, and Coca-cola - An profilometric and image analysis study.

AIM

The aim of this study is to evaluate the surface roughness and color stability of a nanohybrid composite resin after exposure to tea, coffee, Coca-cola, and artificial saliva on the 7, 14, and 28 day.

MATERIALS AND METHODS

Forty specimens of nanohybrid composite resin discs of dimension 6 mm × 2 mm were fabricated and were randomly divided into four equal groups based on beverages (Group 1: control group - artificial saliva, Group 2: Tea, Group 3: Coffee, and Group 4 : Coca-cola). Baseline readings of surface roughness (Ra) and color change (ΔE) were obtained by profilometer and digital image analysis technique in CIE lab scale followed by the readings (ΔE) taken on the 7, 14, and 28 day of exposure to respective beverages.

STATISTICAL ANALYSES

One-way analysis of variance (ANOVA) followed by Tukey's test and paired -test along with Pearson's correlation with a = 0.05.

RESULTS

Overall, highest surface roughness was obtained in the samples exposed to Coca-cola followed by coffee and tea while the least surface roughness was obtained in the samples exposed to artificial saliva (control group) which was statistically significant ( < 0.05). Overall highest color change was obtained in tea followed by coffee and Coca-cola. The least color change was observed in the samples exposed to artificial saliva (control group) ( < 0.05).

CONCLUSION

Surface roughness and color change were time dependent as both increased with time. Furthermore, greater the surface roughness, more was the color change observed in all the groups at all tested time intervals.